Turbine-blade.



W. B. FLANDERS.

TURBINE BLADE.

APPLICATION FILED r1113. 7, 1911.

1,050,1 19. Patented Jan. 14, 1913.

WITNESSES: INVENTOR' J} \NW 3%. 5mm Qw/WQ UNITED STATliS PATENT OFFICE.

WARREN B. FLANDERS, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR, BYEMESNE ASSIGNMIENTS, TO THE COLONIAL TRUST COMPANY, TRUSTEE, OF PITTSBURGH, PENN-SYLVANIA, A CORPORATION OF PENNSYLVANIA.

TURBINE-BLADE.

Specification of Letters Patent.

Patented Jan. 14, 1913.

To all whom it may concern Be it known that I, \VARREN B. FLANonRs, acitizen of the United States, and a resident of Pittsburgh, in thecounty of Allegheny and State of Pennsylvania, have made a new anduseful Invention in Turbine- Blades, of which the following is aspecification.

This invention relates to means for securing blades or vanes to a bladeholding element.

As an example of the application of the invention I have illustratedblades for Parsons type turbine secured to a base strip by suitablefastening devices.

In the drawings: Figure 1 is a fragmental perspective view vof a basestrip to which a plurality of blades are attached; Fig. 2 is a plan Viewof the base strip, the blades being shown in section; Fig. 3 is asection on the line 33 of Fig. 2; and Fig. 4 is a detail perspectiveView. of one of the inserts or fastening devices for securing the bladesand base strip together.

A preferred embodimentrof myinvention is illustrated in the drawings ascomprising a base strip 5 having a straight side 6 and an incline side'T; the incline side being adapted to fit in an undercut portion in agroove ir the element which is adapted to receive it. The strip 5 isillustrated as being provided with a plurality of approximatelycomma-shaped openings 8, whichextend laterally through the strip 5 andwhich are adapted to receive the ends of blades 9. The contours of theblades are concavo-convex, that is, the convex face 10 of each blade 9will be of approximately the same shape as the edge 11 of the opening 8which receives it. The thickness of each blade 9 is less than the widthof the opening 8 so that the space between the concave portion 12 ofeach blade and the edge 13 of the opening 8 may be filled by an insertor filler piece 14. The filler piece or insert 1a is best shown in Fig.t as being approximately comma-shaped in cross section. The blades andinserts may be introduced into the openings 8 of the base strip and theinserts swaged or calked into the sockets or openings 8 so as to upsetthem; that is, change the cross sectional area of the insert and therebysecurely fasten the roots of the blades 9 in the base strip.

Units comprising a base strip, blades and inserts or packing pieces maybe made of any desiredlengths ready to be inserted into the turbineelement to receive them. The preferred form of base strip will be thatshown in Fig. 1 so that the base strips may be put in grooves andfastened in by wedges in a manner commonly employed at this time;however, it is obvious that the particular form of base strip shown isnot essential to my invention.

Having thus described my invention What I claim and desire to secure byLetters Patent is:

1. The combination of a base strip having approximately comma-shapedopenings, blades in the openings and inserts filling the spaces betweenthe faces of the blades and edges of the openings.

The combination with a base strip having a plurality of openingstherein, blades fitting in the openings and packing ieces for securingthe root-s of the blades 1n the openings in the strip, the packingpieces being of approximately the same cross-sectional area as thespaces which are to receive them.

3. The combination with a base strip having comma shaped openings,blades in the openings and having their convexed faces conforming to oneside of an opening in the strip, and a packing piece interposed in theopening between a concave face of the blade and one edge of the opening.

4.. A base strip having a plurality of openings, a blade for eachopening and havin its convex side bearing against one edge 0 theopening, a space being formed between the convex side of the blade andthe opensubscribed my name this 3rd day of Febing, and a packing pieceinsertible in said ruary, 1911, space to fasten the blade in itsopening, the

packing pieces being of approximately the V WARREN FLANDERS' 5 samecross-sectional area as the spaces-which Witnesses:

are to receive them. C. W. MQGHEE,

In testimony whereof, I have hereunto B. M. FERO.

